<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>grid-template-rows neutral keyframe</title>
<link rel="help" href="https://drafts.csswg.org/css-grid/#track-sizing">
<meta name="assert" content="grid-template-rows supports neutral keyframe.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
</head>
<body>
<div id="target"></div>
<script>
test(() => {
target.style.gridTemplateRows = '10px [a] 20px [b]';
var animation = target.animate([{}, {gridTemplateRows: '30px 40px [c]'}], 1000);
animation.pause();
animation.currentTime = 250;
assert_equals(getComputedStyle(target).gridTemplateRows, '15px [a] 25px [b]');
target.style.gridTemplateRows = '10px 20px [d]';
assert_equals(getComputedStyle(target).gridTemplateRows, '15px 25px [d]');
}, 'Invalidate the result for the neutral keyframe if the named lines change.');
</script>
</body>
</html>